python - 'type' 对象在使用 django_enums 时不可迭代

Question

我尝试使用 django_enums并在进行迁移时遇到 list(cls) 错误:

(venv:SFS)rita@rita-notebook:~/Serpentarium/ServiceForServices/project/serviceforservices$ python manage.py makemigrations
    Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/home/rita/Serpentarium/ServiceForServices/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "/home/rita/Serpentarium/ServiceForServices/venv/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 341, in execute
    django.setup()
  File "/home/rita/Serpentarium/ServiceForServices/venv/local/lib/python2.7/site-packages/django/__init__.py", line 27, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/home/rita/Serpentarium/ServiceForServices/venv/local/lib/python2.7/site-packages/django/apps/registry.py", line 108, in populate
    app_config.import_models(all_models)
  File "/home/rita/Serpentarium/ServiceForServices/venv/local/lib/python2.7/site-packages/django/apps/config.py", line 199, in import_models
    self.models_module = import_module(models_module_name)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/home/rita/Serpentarium/ServiceForServices/project/serviceforservices/service/models.py", line 84, in <module>
    class EmployeesStatus(models.Model):
  File "/home/rita/Serpentarium/ServiceForServices/project/serviceforservices/service/models.py", line 86, in EmployeesStatus
    status = enum.EnumField(StatusEnum, default=StatusEnum.AT)
  File "/home/rita/Serpentarium/ServiceForServices/venv/local/lib/python2.7/site-packages/django_enums/enum.py", line 53, in __init__
    kwargs['max_length'] = self.enum.get_max_length()
  File "/home/rita/Serpentarium/ServiceForServices/venv/local/lib/python2.7/site-packages/django_enums/enum.py", line 39, in get_max_length
    return len(max(list(cls), key=(lambda x: len(x.key))).key)
TypeError: 'type' object is not iterable

我安装了 django-enums，枚举和六个:

(venv:SFS)rita@rita-notebook:~/Serpentarium/ServiceForServices/project/serviceforservices$ pip install django-enums
(venv:SFS)rita@rita-notebook:~/Serpentarium/ServiceForServices/project/serviceforservices$ pip install enum
(venv:SFS)rita@rita-notebook:~/Serpentarium/ServiceForServices/project/serviceforservices$ pip install six

在 Models.py 中使用:

...
from django_enums import enum

...
class StatusEnum(enum.Enum):
__order__ = 'AT BT BC AC'  # for python 2

AT = (u'АВ', u'Активен временно')
BT = (u'БВ', u'Блокирован временно')
BC = (u'БП', u'Блокирован постоянно')
AC = (u'АП', u'Активен постоянно')

class EmployeesStatus(models.Model):
    name = models.CharField(max_length=128)
    status = enum.EnumField(StatusEnum, default=StatusEnum.AT)

看起来项目还活着，它也针对 Django 1.10 进行了更新，据称与 python 2 兼容。那么，我做错了什么？

Answer 1

看起来您正在尝试使用 3.4 stdlib 中向后移植的枚举，但您安装了 enum——您需要安装 enum34。